any type of vegetable, animal, regenerated, synthetic or mineral filament which is long in relation to its thickness and is fine and flexible. Yarns and fabrics are manufactured from them, by spinning and weaving, or knitting, felting, bonding etc and they are also used directly as reinforcement in composite materials.
... Copolymer of vinylidene chloride with vinyl chloride, containing by weight 79,5 % or more of vinylidene chloride, in one of the forms mentioned in note 6 (a) or (b) to Chapter 39, for the manufacture of fibres, monofilament or strip (a) ...